Answer:
A. Reversibility
Explanation:
Because if you don't progress then you do the opposite, you reverse.
Sorry if my explanation is confusing it made sense in my head i just didn't know how to put it.
hope this help. ;)
Answer:
A. Reversibility
Explanation:
Difference between relating velocity and angular velocity?
Answer:
Linear velocity is speed in a straight line (measured in m/s) whileangular velocity is the change in angle over time (measured in rad/s, which can be converted into degrees as well).
Explanation:
hope this helps :)
A piston above a liquid in a closed container has an area of 0.75m^2, and the piston carries a load of 200kg. What will be the external pressure on the upper surface of the liquid?
Answer:
2613.3 pa
Explanation:
p=F/A
p=ma/A
p=200×9.8/0.75
p=2613.3
Of the pairs of galaxies listed in the answer choices, which is the closest to the Milky Way Galaxy?
Answer:
Andromeda galaxy
Explanation:
Answer:
Andromida galaxy
Explanation:
In 4 billion years the milky way and the Andromida galaxy will collide with each other
Please help me on this
Answer:
Explanation:
read the assignment and use this
Topic sentence
Evidence from the text
Thoughts in your own words
Opinion
Wrap up sentence
T
E
T
O
W
and 2 of those make 2 paragraphs
How many electrons and how many protons
are in an atom of Fluorine?
19
10
9
Explanation:
a fluorine atom has nine protons and electrons so it is electrically neutral
Answer:
no bloody idea
Explanation:
???
a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal . It remained in the air for 2 s. Which of the following quantities was constant while the baseball was in the air?
Answer:
Explanation:acceleration
If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.
What is a projectile motion?It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.
As given in the problem a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds.
Thus, If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.
Learn more about projectile motion here, refer to the link given below ;
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A 310 kg car is parked in a parking garage. If the car has 35,944 J of potential energy, how many
meters above ground is the car?
Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. It can be calculated as its weight times the height. This is:
[tex]\boxed{U_g=W\cdot h=mgh}[/tex]
Where:
W is the weight of the objectm is the massg is gravitational accelerationh is the heightSolving for the h:
[tex]h=\dfrac{U_g}{mg} = \dfrac{35944\;J}{310\;kg\cdot 9.8\;m/s^2} = 11.8\;m[/tex]
R/ The car is parked 11.8 m above ground
In 1926 Babe Ruth hit a home run that was estimated to have landed 180. meters from home plate and to have reached a height of 21.3 meters. What was the initial velocity of the ball?
Answer:
v = 47.85 m / s , θ = 64.7º
Explanation:
This is a missile throwing exercise.
Let's find the speed to reach the maximum height, at this point the vertical speed is zero
[tex]v_{y}^{2}[/tex] = v_{oy}^{2} - 2 g y
0 = v_{oy}^{2} - 2gy
v_{oy} = √2gy
let's calculate
v_{oy} = √ (2 9.8 21.3)
v_{oy} = 20.43 m / s
now we can calculate the time it takes to get to this point
vy = v_{oy} - g t
t = v_{oy} / g
t = 20.43 / 9.8
t = 2.08 s
in projectile launching, the time it takes for the body to rise is the same as the time it takes to go down, so the total launch time is
[tex]t_{v}[/tex] = 2 t
t_{v} = 2 2.08 = 4.16 s
let's use the horizontal throw ratio
x = v₀ₓ t_{v}
v₀ₓ = x / t_{v}
v₀ₓ = 180 / 4.16
v₀ₓ = 43.27 m / s
initial velocity is
v = √ (v₀ₓ² + v_{oy}^{2})
v = √ (20.43² + 43.27²)
v = 47.85 m / s
with an angle of
tan θ = I go / vox
θ = tan⁻¹ (43.27 / 20.43)
θ = 64.7º
What will happen to the speed of the Greenhouse effect if all the methane trapped in the permafrost is released into the
earth's atmosphere?
Answer:
The atmosphere would become warmer
Explanation:
methane absorbs the suns heat, therefore warming the atmosphere. if all the methane from the premafrost melted, would would have a huge large scale global warming, the giant increase of temperature could have devistating effects on all life on our planet.
Tires of a Bigfoot truck has a diameter of 2.2 m. If it rotates 60 revolutions find distance travel on the road.
Answer:
[tex]s = 414.7 m\\[/tex]
Explanation:
The relationship between the linear distance covered by an object and its angular displacement is given by the following formula:
s = rθ
where,
s = distance traveled on road = ?
r radius of tires = diameter/2 = 2.2 m/2 = 1.1 m
θ = angular displacement = (60 rev)(2π rad/1 rev) = 377 rad
Therefore,
[tex]s = (1.1 m)(377 rad)\\s = 414.7 m[/tex]
If it takes Jeff 3 hours and 33 minutes to drive 500 miles, what is his average velocity over this time?
Answer:
141 mphExplanation:
aver. velocity = distance over time
= 500 miles
3 hours + (33 min. x 1 hr. )
60 min.
= 500 miles
3.55 hours
= 140.845 ≈ 141 miles / hour
A grocery store sells 5-lb bags of mangoes. You purchase four bags over the course
of a month and weigh the mangoes cach time. You obtain the following
measurements:
Week 1 weight: 4.8 lb
Week 2 weight: 5.3 lb
Week 3 weight: 4.9 lb
Week 4 weight: 5.4 lb
is the measurement accurate or precise?
Answer:
Accurate
Explanation:
Accuracy deals with the nearness of the measured values to the true value.
Precision is the ability to reproduce a certain result in a repeated fashion.
From the given masses of the 5-lb bags, we see that the mean value of the measurement is 5.1-lbThis value is very close to the original mass of the bag which is 5-lb bags. We can say the reading is accurateThe reading is not precise because, the same weight is not reproduced. Different values of weight was reported from each of the measurement process.
Two objects, A and B, have the same volume and are completely submerged in a liquid, although A is deeper than B. Which object, if either, experiences the greater buoyant force?
a. Object B, because the closer an object is to the surface, the greater is the buoyant force.
b. Both objects experience the same buoyant force.
c. Object A, because, being at a greater depth, it experiences a greater pressure.
Answer:it would probably be C
Explanation:
At what speed do a bicycle and its rider, with a combined mass of 110 kgkg , have the same momentum as a 1400 kgkg car traveling at 6.0 m/sm/s
Answer:
76.36m/sExplanation:
Step one:
given data
let the mass of the rider be m,=110kg
let the velocity be v=?
let the mass of the car be M,=110kg
let velocity of the car V=6m/s
Step two:
the momentum of an object is given by the expression
P=mv
Step two:
since the two the bicycle rider must have the same momentum as the car,
then we need to equate their momentum
mv=MV
110*v=1400*6
110v=8400
divide both sides by 110 to find v
v=8400/110
v=76.36m/s
The rider is expected to have a speed of 76.36m/s
Atoms of elements in the same group of the periodic table share the same
Answer:
Atoms of elements in the same group of the periodic table share the same ELECTRONS
Explanation:
May I have brainliest please? :)
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. If the trebuchet launches the stones with a velocity of +48.5" m"/s at an angle of 42.0°, how long does it take the stone to hit the ground? For those settings, what is the maximum range? How high will the stones go? Show all your work
Answer:
a) t = 6.62 s
b) x = 238.6 m
c) H = 53.7 m
Explanation:
a) We can find the time of flight as follows:
[tex] y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} [/tex]
Where:
[tex]y_{f}[/tex] is the final height = 0
[tex]y_{0}[/tex] is the initial height = 0
[tex]v_{0_{y}}[/tex] is the initial vertical velocity of the stone
t: is the time
g: is the gravity = 9.81 m/s²
[tex] v_{0}sin(42)t - \frac{1}{2}gt^{2} = 0 [/tex]
[tex] 48.5 m/s*sin(42)*t - \frac{1}{2}9.81 m/s^{2}*t^{2} = 0 [/tex]
By solving the above quadratic equation we have:
t = 6.62 s
b) The maximum range is:
[tex] x = v_{0_{x}}t = 48.5 m/s*cos(42)*6.62 s = 238.6 m [/tex]
c) The maximum height (H) can be found knowing that at this height the final vertical velocity of the stone is zero:
[tex] v_{f_{y}}^{2} = v_{0_{y}}^{2} - 2gH [/tex]
[tex] H = \frac{v_{0_{y}}^{2} - v_{f_{y}}^{2}}{2g} = \frac{(48.5 m/s*sin(42))^{2} - 0}{2*9.81 m/s^{2}} = 53.7 m [/tex]
I hope it helps you!
The heating element on an electric iron has a resistance of 24 ohm and draws a current of
5.0 A. How much work is done if the iron is used for 45 minutes?
Answer:
1620000J
Explanation:
Given parameters:
Resistance = 24ohm
Current = 5A
Time = 45min
Unknown:
Work done = ?
Solution:
Electrical work done is given as the product of power with time;
Electrical work done = power x time
Power = I²R
Electrical work done = I²R x time
Convert the given time to seconds;
1min = 60s
45 min = 45 x 60 = 2700s
Now,
Work done = 5² x 24 x 2700 = 1620000J
1. A ball is launched horizontally at 40 m/s while 6.0 m above a level field . How far will the ball move horizontally before striking the ground ?
Answer:
44 m
Explanation:
Given that,
Horizontal velocity of the ball, u = 40 m/s
It is 6 m above the level field.
We need to find the distance covered by the ball when move horizontally before striking the ground. Let it is d.
Firstly, we will find time taken for the ball to hit the ground. Using second equation of motion as follows :
[tex]s=ut+\dfrac{1}{2}at^2[/tex]
Put u = 0 and a = g
[tex]s=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2s}{g}} \\\\t=\sqrt{\dfrac{2\times 6}{9.8}} \\\\t=1.1\ s[/tex]
No finding the horizontal distance as follows :
d = ut
d = 40 m/s × 1.1 s
d = 44 m
So, the ball will move 44 m horizontally before striking the ground.
Which expression can be used to calculate centripetal acceleration?
4p2r/T2
4p2r/T
2pr/T
(2pr)2/T2
Answer:
What is the magnitude of the centripetal acceleration of a car following a curve of radius 500 m at a speed of 25.0 m/s (about 90 km/h)? Compare the acceleration with that due to gravity for this fairly gentle curve taken at highway speed. See Figure 2a.
Strategy
Because v and r are given, the first expression in
a
c
=
v
2
r
;
a
c
=
r
ω
2
a
c
=
v
2
r
;
a
c
=
r
ω
2
is the most convenient to use.
Solution
Entering the given values of v = 25.0 m/s and r=500 m into the first expression for ac gives
a
c
=
v
2
r
=
(
25.0
m/s
)
2
500
m
=
1.25
m/s
2
a
c
=
v
2
r
=
(
25.0
m/s
)
2
500
m
=
1.25
m/s
2
.
Discussion
To compare this with the acceleration due to gravity (g = 9.80 m/s2), we take the ratio of
a
c
g
=
(
1.25
m/s
2
)
(
9.80
m/s
2
)
=
0.128
a
c
g
=
(
1.25
m/s
2
)
(
9.80
m/s
2
)
=
0.128
. Thus, ac=0.128 g and is noticeable especially if you were not wearing a seat belt.
Explanation:
as a result of photosynthesis is the production of sugar molecules known as what?
Answer:
Glucose
Explanation:
Answer:
Check in your science textbook
how do you believe the brain works to help you learn and grow
Answer:
I think
Explanation:
the brain grows more when you learn something new, and less when you practice things you already know. i think- lol
A certain frictionless simple pendulum having a length L and mass M swings with period T. If both L and M are doubled, what is the new period?
a. T
b. 2T
c. √2T
d. T/2
e. T/4
Answer:
c. √2T
Explanation:
The period of a simple pendulum is given by;
[tex]T = 2\pi \sqrt{\frac{L}{g} } \\\\\frac{T}{2\pi} = \sqrt{\frac{L}{g}} \\\\\frac{T^2}{4\pi^2} = \frac{L}{g}\\\\\frac{g}{4\pi^2} = \frac{L}{T^2}\\\\ \frac{L_1}{T_1^2}= \frac{L_2}{T_2^2}\\\\T_2^2 = \frac{L_2T_1^2}{L_1}\\\\L_2 = 2L_1\\\\ T_2^2 = \frac{2L_1T_1^2}{L_1}\\\\ T_2^2 =2T_1^2\\\\T_2 = \sqrt{2T_1^2}\\\\T_2 = T_1\sqrt{2}[/tex]
Thus, the the new period will be √2T
A wagon wheel consists of 8 spokes of uniform diamter, each of mass m, and length L. The outer ring has a mass m rin. What is the moment of inertia of the wheel through an axis through the center and perpendicular to the plane of the ring? Assume that each spoke extends from the center to the outer ring is of negligible thickness.
Answer:
[tex]L^2(\dfrac{8m}{3}+m_r)[/tex]
Explanation:
m = Mass of each rod
L = Length of rod = Radius of ring
[tex]m_r[/tex] = Mass of ring
Moment of inertia of a spoke
[tex]\dfrac{mL^2}{3}[/tex]
For 8 spokes
[tex]8\dfrac{mL^2}{3}[/tex]
Moment of inertia of ring
[tex]m_rL^2[/tex]
Total moment of inertia
[tex]8\dfrac{mL^2}{3}+m_rL^2\\\Rightarrow L^2(\dfrac{8m}{3}+m_r)[/tex]
The moment of inertia of the wheel through an axis through the center and perpendicular to the plane of the ring is [tex]L^2(\dfrac{8m}{3}+m_r)[/tex].
Tell what is an element in your words ?
Please help
Answer: an element is a substance that cannot be broken down. it can’t be chemically decomposed into a different substance. elements are made up of just one atom
Explanation:
Arrange an 8-, 12-, and 16-Ω resistor in a combination that has a total resistance of 8.89 Ω pls with de work
A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x -direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s in the negative x -direction. What is momentum of the ball before it hits the wall, p? What is momentum of the ball after it hits the wall, p,? What is the change in momentum of the ball, delta p? (Give both magnitude and direction for each answer.) Is momentum conserved for the ball?
Explanation:
Step one:
given dara
mass of ball m=0.kg
initial velocity u= 10 m/s
final velocity v=10m/s
Required
momentum before and after impact
the expression for momentum P
P=mv
before impact
P=mv
P1=0.5*10
P1=5(kg⋅m/s)
after impact
P=mu
P2=0.5*10
P2=5(kg⋅m/s)
change in momentum is =P1-P2= 5-5=0
yes, momentum is conserved.
How many degrees should a planet move across the sky when completing one revolution around the Sun?
Answer: 18o degrees
Explanation: :)
The planet should move across the sky when completing one revolution around the Sun is 180 degrees.
What is Planet?Planets are large, spherical celestial objects that are neither stars nor their leftovers. The nebular hypothesis, which states that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a proto-planetary disk, is the best theory currently available for explaining planet formation.
More than 5,000 exoplanets, as they are known, were found as a result of further astronomical advancements. These consist of hot Jupiter's, which are enormous planets that revolve around their parent.
The steady accumulation of matter accelerated by gravity, or accretion, is how planets expand within this disk. There are at least eight planets in the Solar System, including the gigantic planets Jupiter, Saturn, Uranus, and Neptune as well as the terrestrial planets Mercury, Venus, Earth, and Mars.
Therefore, the planet should move across the sky when completing one revolution around the Sun is 180 degrees.
To know more about Planet:
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neon sign transformer has a 460W AC output with an rms voltage of 15 kV when connected to a normal household outlet. There are 500 turns of wire in the primary coil. How many turns of wire does the secondary coil have
Answer:
The number of turns in the secondary coil is 62,500 turns.
Explanation:
Given;
power of the transformer, P = 460 W
output voltage, V₂ = 15 kV = 15,000 V
input voltage of normal household outlet, V₁ = 120 V
number of turns in the primary coil, N₁ = 500 turns
number of turns in the secondary coil, N₂ = ?
Apply the following the transformer equation;
[tex]\frac{N_2}{N_1} = \frac{V_2}{V_1}\\\\N_2 = \frac{V_2}{V_1}*N_1\\\\N_2 = \frac{15000}{120}*500\\\\N_2 = 62500 \ turns[/tex]
Therefore, the number of turns in the secondary coil is 62,500 turns.
Earth receives light and heat energy from the sun. Every now and then Ohio has
a
blue, sunny day. When the sun is shining, Ms. Welch can feel the heat of the sun on
her face.
How does light and heat energy from the sun reach Earth?
By mechanical waves that transfer heat and light energy
By radio waves that transfer heat and light energy
By electromagnetic waves that transfer heat and light energy
By sound waves that transfer heat and light energy
his
Answer: By electromagnetic waves that transfer heat and light energy
Explanation: electromagnetic waves travels through space it cant be radio waves use electromagnetic waves so they can travel through spac too but with the help of electromagnetic waves.
please give brainliest, tell if right or wrong
Thanks have a good day :)!
Light and heat energy from sun reach earth by electromagnetic waves that transfer heat and light energy.
What are electromagnetic waves?
The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
Learn more about electromagnetic waves,here:
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After school, you watch your friend Katie run to a truck as soon as she hears the truck's music playing. Later, you find out the truck is the ice cream vendor's vehicle. How would a behaviorist interpret Katie's running to the truck?
Katie has been conditioned to the music and has associated the musical truck with serving ice cream.
Katie uses the music as a test of her biological reflexes.
Katie feels empathetic for the man driving the ice cream truck in such hot weather and wants to take him a drink of water.
Katie remembers the pattern of the music and knows the truck is too far away to reach unless she runs.
Answer:
A- Katie has been conditioned
Explanation:
Katie has associated the ice cream truck music with something positive like ice cream that makes her happy. it's kinda like a dog clicker, whenever a dog hears the click they know that click means a treat, which is the same for Katie, ice cream jingle means treat.